Twin scroll vs dynamic turbo?

Just wondering if anyone could shed some light on the difference between the twin scroll turbo in the CX50 compared to the dynamic pressure turbo in the CX5 (and other 2.5T applications). Is this just a difference in marketing lingo or is there an actual difference between how the turbo is fed? Thanks!
 
These are not just generic explanations but instead are Mazda-specific, therefore more helpful.


 
Twin scroll vs dynamic pressure manifold is meaningless to me until we get both Cx-5 & CX-50 to a dyno and roll race to see if the gains are there. Or if they did it because they realized the design of the dynamic pressure turbo was causing the the crakes in the 2.5t heads (due to the extra heat caused by the flap used to create boost earlier).

These a 4 cylinder engines and a difference of 5 hp/full boost 250 rpms sooner is nothing on the but dyno. Both types of manifold listed above get the turbo to spool up really early in the power band and has nothing to do with the top end of the RPM. Would have been better off with a dual ball bearing turbo for fast spool and hold boost pressure higher into the top end of the rpm.

Personally I would rather have a turbo build full boost at 2.5k-3k rpm and pull to redline then ones that achieve full boost at 1.5k-2k but run out of breath by 4.5k-5k. Yes you get that low end torque with the current setup but you wind up losing mpg’s around town (city) because the turbos are hitting full boost so soon. And the High Pressure fuel pumps are known to not provide much head room down low on the rpm scale (check out the speed3/6, VW forums as it’s discussed in great detail).
 
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